Hi all. My car has one wing without the Renault 4 chrome insignia. I have bought the two parts and anticipate fixing them on. I see that the pieces have thin pins on the back which must project through holes to be drilled in the wing. Is there a special grommet to slip over the pin on the inside of the wing? I can think of ways to fix the emblem but what is the original method, and where do you get the bit ?